Grigson was most recently with the Browns, working as a senior personnel executive for one year. He was the general manager of the Colts from 2012-16, where he saw most of his success.

During his tenure with the Colts, Grigson drafted franchise cornerstones Andrew Luck and T.Y. Hilton in the 2012 draft. Following the 2012 season, Grigson was named Sporting News Executive of the Year.

Things started to take a turn shortly after, though. Grigson missed badly in the 2013 draft, selecting defensive end Bjoern Werner with the 24th overall pick. Then, at the start of the 2013 season, he traded away the Colts' 2014 first-round pick for running back Trent Richardson.

Grigson's time in the NFL dates back to 1995, when he was drafted in the sixth round by the Bengals. He also briefly spent time in the CFL, playing for the Toronto Argonauts.